Meaning of the word "donkey's years" in English

What does "donkey's years" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

donkey's years

US /ˈdɑŋ.kiz jɪərz/
UK /ˈdɑŋ.kiz jɪərz/
"donkey's years" picture

Idiom

1.

a very long time

Example:
I haven't seen him in donkey's years.
It's been donkey's years since we last went on holiday.
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